John s



(No Model.)

J. S. SMITH.

TILE MACHINE.

Patented Dec. 2, 1884.

WITNESSES Attorney through the length of the hollow shaft.

UNITED STATES PATENT ()FFICE.

JOHN S. SMITH, OF JACKSON, MICHIGAN, ASSIGNOR OF ONE-HALF TO THEODOREBENNETT, OF SAME PLACE.

"TILE-MACHINE.

SPECIFICATION forming part of Letters Patent No. 308,710, dated December2, 1884.

Application filed June 21,1884.

(No model.)

,10 all whom, it may concern:

Be it known that I, JOHN S. SMITH,of J ackson, in the county of Jacksonand State of Michigan, have invented a new and useful Iniprovement inTile-Machines, of which the following is a specification.

My invention relates to the shaft which carries the spiral flanges toforce the clay out from the bottom of the pug-mill into the die, and theobject of my invention is to provide for the use of a hollow shaftthrough which a rod may pass for sustaining the conical core which formsthe interior of the pipe formed by forcing the clay by the action of thespiral flanges through the die and around the central core. It ispreferable that this core should-be stationary. It has sometimes beenattached to a pin projecting from the end of the pressure-shaft. As thepin rotated inside the core it was difficult to lubricate it, and alsoto prevent the clay from being forced into the space between the coreand the pin, where it would be packed, so causing the core to revolvewith the shaft, adding greatly to the friction. In some cases the shaftwas made hollow, and an iron rod carrying the core on its end was runBut here, also, the clay would be forced into the space betweenthe'shaft and the rod, adding very greatly to the frictional resistance.My present improvement is intended to obviate this difficulty, and alsoto provide a bearing to sustain the back thrust of the shaft occasionedby theresistanee of the clay to the action of the spiral flanges, and tolubricate the same.

In the annexed drawings, making part of this specification, Figure l isa side elevation of the shaft. Fig. 2 is a longitudinal section. Fig. 3is a section on the lineman, Fig. 2. Fig. 4 is a section on the line 313Fig. 5 is a section on the line 2 z.

The same letters are employed in all-the figures in the designation ofidentical parts.

A is the tubular shaft carrying the spiral flanges which press the claythrough the die. As the flanges, core, and die are in common use theyare not shown. Through the center of this shaft is passed an iron rod,13, which is intended to carry the conical core in the die. 0 Thediameters of the chamber within the shaft and the rod B are such thataspace is left between the shell and the rod to form an oilchamber, G.The ends of the tubular shaft are closed by the packing D D, which maybe confined by caps over the ends of the shaft through which the rodpasses. This packing is intended to confine the oil in the chamber, aand prevent any clay from being forced into the space between the rodand the shaft. the clay is stiff it requires considerable force appliedby the spiral flange to force it through the die, and this resistancecauses a corresponding longitudinal thrust of the shaft in the oppositedirections To sustain this 1 fasten 6 5 to the driving-hub of the shafta box, E,wl1ich incloses the shaft, and should also have a packing-ringin which the shaft can be confined to prevent the escape of oil. Vithinthis boX or case E, I place a collar, F, which is keyed to the shaft andsustains the longitudinal thrust of the flanged shaft A.

G is an oil-cup, which may be used for filling the chamber 0, and thenclosed so as to keep the chamber full of oil. H is a similar cup forfilling and confining the oil in the box IE.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In combination with the tubular shaft A and rod B, forming anoil-chamber, 0, packing D D, for confining the oil within the chamber,substantially as set forth. V y 2. In combination with the shaft A, andwasher F, for sustaining the thrust of the shaft 8 5 longitudinally, anoil-chamber formed by the closely-fitting case E,inclosing the shaft,substantially as set forth.

As witness my hand in the presence of two attesting witnesses, the 16thday of June, 1884. 93

JOHN S. SMITH.

In presence of CHARLES LINDEMER, ELI A. CLEMENT.

